Machining method of curved surface prism Fery prism

Abstract

The invention discloses a machining method of a curved surface prism Fery prism. The machining method of the curved surface prism Fery prism is characterized by comprising the following steps: machining an initial structure of the curved surface prism Fery prism; fixing the initial structure of the curved surface prism Fery prism on an optical machining center rotary platform, enabling an axial line of a cylinder to be coaxial with the optical machining center rotary platform, and machining a first curved surface on an end face of the cylinder, wherein an optical axis of the machined first curved surface of the curved surface prism Fery prism coincides with the axial line of the cylinder; designing and manufacturing a fixture, wherein the appearance of the fixture is cylindrical, the fixture is provided with a clamping groove which is cylindrical, an axial line of the clamping groove and an axial line of the fixture are arranged in an inclined mode, and the axial line of the fixture is enabled to coincide with an optical axis of a to-be-machined second curved surface of the curved surface prism Fery prism; clamping the initial structure of the curved surface prism fery prism on the fixture, wherein the initial structure of the curved surface prism Fery prism is provided with the machined first curved surface, enabling an axial line of a cylinder of the fixture to be coaxial with the optical machining center rotary platform, and machining the second curved surface on the end face of the cylinder of the initial structure of the curved surface prism Fery prism. The machining method of the curved surface prism Fery prism has the advantages of being high in machining precision, simple in structure, low in cost, high in efficiency, and prone to batch machining.

Description

technical field [0001] The invention belongs to the technical field of optical device manufacturing and ultra-precision processing, and relates to a processing method of a curved prism, in particular to a processing method of a Ferry prism. Background technique [0002] With the continuous development of optical design concepts and optical processing technology, free-form prisms are widely used in helmet-mounted displays, entertainment video glasses, and simulations due to their excellent optical performance, small size, compact structure, and ease of assembly accuracy requirements. Training, surgery and many other fields. Therefore, the research on the manufacturing technology of curved prisms is of great significance for national defense weapons and equipment, medical equipment, etc. [0003] At present, the processing of optical curved prisms is mainly realized by diamond turning technology. There are two main methods: one is to directly process diamond turning methods t...

AI Technical Summary

Problems solved by technology

Compared with complex free-form prisms, the two curved surfaces of Ferry prisms are usually designed as spherical or aspherical surfaces with rotational symmetry about the optical axis. If the existing free-form prism processing methods are used to process Ferry prisms, the cost is high, and It is difficult to guarantee the optical axis accuracy of the two curved surfaces, so it is necessary to propose a new and practical curved prism processing method that is easy to realize mass production

Images